CVE-2026-64443

Status: UPDATED  |  Advisory ID: CVE-2026-64443

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop

The IE parsing loop in update_beacon_info() advances by

(pIE->length + 2) each iteration but only guards on i < len.

When a malicious AP sends a Beacon whose last IE has only one byte

remaining in the frame (the element_id byte lands at len-1), the loop

reads pIE->length from one byte past the allocated receive buffer.

Additionally, even when the header bytes are in bounds, pIE->length

itself can extend the data window beyond len, passing a truncated IE

to the handler functions.

Add two guards at the top of the loop body:

1. Break if fewer than sizeof(*pIE) bytes remain (can't read header).

2. Break if the IE's declared data extends past len.

Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length

for consistency with the sizeof(*pIE) guards added above. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References